Gage.



No- 838,684. PATENTED DEC. 18, 1906.

' M. P. CARR.

v GAGE. APPLI OATION FILED APR. 5, 1906.

. fi /Mae/ 7628/15 THE NORRIS PETERS co., WASHINGTON, n. :4

UNITED STATES PATENT FFI CE.

GAGE.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed April 5, 1906. Serial No. 310,149-

To 0.7]. whom, it may concern:

Be it known that I, MICHAEL F. CARR, a citizen of the United States, residing at l/Vashington, in the District of Columbia, have invented certain new and useful Improvements in Gages; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in gages for use in marking rivet-holes 011 metal and for similar purposes.

The object of the invention is to provide a simple and practical device of this character which will be well ada ted for the purpose intended and which WIII GIIBCt a great saving in the time and labor expended in marking rivet-holes or other points equally distant apart.

l/Vith the above and other objects in View the invention consists in certain novel fea tures of construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a plan view of my improved marking-gage, showing the same in a partially extended or open position. Fi 2 is a longitudinal sectional view taken 011 the plane indicated by the line 2 2 of Fig. 1. Fig. 3 is a detail sectional view, on an enlarged scale, taken on the plane indicated by the line 3 3 of Fig. '1; and Fig. .4 is a perspective view of the clip which serves as a sliding pointer.

My improved gage comprises a plurality of parallel members or bars 1, connected by pairs of crossed arms 2, so that they may be moved or adjusted toward and from each other and maintained at all times in their parallel relation, the pairs of crossed arms or toggle-j oints forming a lazy-tongs connection, which causes the members or bars 1 to move simultaneously toward and from each other, and thereby keep the same at equal distances from each other. The members or bars 1 and the arms 2 are preferably constructed of flat strips of steel or other suitable metal, and the members or bars are of greater length, so that their ends 3 project and form markingrulers or straight-edges. The arms 2 of each pair are of equal length and are pivotally connected to each other at their centers, as shown at 4. Their upper'ends are pivotally connected to each other and to the upper portionsof the members or bars 1 by stationary pivots 5, while their lower ends are pivoted together and slidably pivoted upon the lower ends of the bars or members 1 by pivots 6, which pass through alining openings in the arms 2 and through longitudinally-extending slots 7 in the members or bars 1. These pivots Gmaybe in the form of rivets or bolts; but upon two or more of the members or bars I employ bolts or clamping devices for securing the parts of the device in an adjusted position. As shown in Figs. 2 and 3, these bolts 6 pass through the alining openings in the arms 2 and the slots 7 in the members or bars 1, in which slots they slide and are adjustably retained by nuts 8 upon their screwthreaded ends. I11 order to indicate the adjustment of the members or bars 1, I provide along the edges of the slots 7 suitable scales or graduations 9 and upon the pivot-bolts 6 sliding pointers 10, which coact with the scales. As shown in Fig. 4, these pointers 10 are in the form of metal clips which are disposed between the under faces of the members or bars 1 and the upper faces of the arms 2 and are formed with centrally-disposed apertures or openings 11, through which the pivot-bolts 6 pass. The ends 12 of these clips are bent up and over the members or bars 1, as shown in Fig. 3, to strengthen the connection between the members or bars 1 and the crossed arms 2 and also to form pointers which coact with the scales or graduations 9. i

The construction, operation, and advan tages of the invention will be readily understood from the foregoing description, taken in connection with the accompanying drawings. It will be seen that when the nuts 8 of the pivot-bolts 6 are loosened the parallel members or bars 1 may be quickly adjusted toward and from each other, the spaces between them being indicated by the position of the sliding pointers upon the scale, and they may be quickly secured in such adjusted position by tightening said nuts. When the tool is thus adjusted, it is placed upon the metal plate or othersurface to be marked and a piece of chalk, a pencil, a knife, or other marking device is run along one of the side edges of the extended ends 3 of each of the parallel members or bars. This tool is exceedingly useful in marking rivet-holes at equally distant points on metal plates or sheets; but it will be understood that it may It may be used for various other purposes.

be quickly and easily set or adjusted and each member or bar will be parallel and eX- actly the same distance apart, so that it effects a great saving of time and labor.

While I have shown and described the preferred embodiment of my invention, it will be understood that I do not wish to be limited to the precise construction herein set forth, since various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the ad-- vantages of the invention as defined in the appended claim.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A gage of the character described comprising a pair of parallel members having longitudinal slots therein, a pair of pivotally-con- I nected crossed arms between said members, fixed pivots upon said members for said arms, pivots for said arms, slidable in the slots in said members, graduations upon one of said members, a clip disposed between one of said members and one of said arms and carried by one of the sliding pivots, said clip having an end bent over said members, to strengthen the connection between the same and the arms connected thereto and also form a pointer to coact with said graduations, and a clamping-nut upon said. sliding pivot, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

MICHAEL F. CARR. Witnesses:

E. P. BUNYEA, M. BAUMGARTEN. 

